You might of seen Vantablack from my instagram or elsewhere. Its striking property is how dark it is. It seems to create a blackhole before your very eyes. 99.965% of radiation is absorbed. It is remarkably black! – Surrey Nano systems But why is it like this? The ‘VANTA’ in Vantablack stands for Vertically Aligned NanoTube…… Continue reading Why is Vantablack so black?
Background I would imagine your first question is ‘Why is enamel resistant to vibrations?’ And that is a good question. Nature has had millions and millions of years to engineer a material for animal teeth that can handle the pressures, stresses and friction of eating/chewing. Biology came up with enamel. Hard ceramic columns are surrounded…… Continue reading Enamel – cooler than you think!
I’m pretty sure you know stainless steel. It’s likely when you last ate with cutlery you handled stainless steel. So what makes this steel stainless? Chromium is key! First of all, we must understand what steel is. Steel is an alloy of iron and carbon. It is a metal that is cheap and has a…… Continue reading What makes Stainless Steel ‘Stainless’?
Gold: A Material History – why is gold so precious? It has been used as currency for thousands of years.
They sound like something straight of science fiction – and in a way they are. They are not totally understood… Their existence was only suggested in 2012.Only recently have researchers (from Maryland/Havard University) managed to make them, as you can read here. First of all, a crystal is just something made of a repeating structure…… Continue reading What are Time Crystals?
Originally posted on cgschoen:
Back in year 1996 Walter Schütz, in his work “A history of fatigue” told the history on how Gassner in 1941, measuring the fatigue strength of high strength aluminum alloys of the series 7XXX (Al-Zn-Mg), and finding this was not much different from the lower strength, lower cost, alloys of series…
Homopolar has nothing to do with gay people living in Lapland. This term basically means that the direction of the magnetic field does not change. These are the simplest type of motor and was first made by Faraday himself in 1821. They use direct current and convert it into rotational energy. They are so easy…… Continue reading What is a Homopolar Motor and how do they work?